/**
 * @name 菠菜
 * @date 2025/4/27 下午6:09
 */
public class Main {
    public static void main(String[] args) {
        
        System.out.println("Hello world!");
        Test006 test06 = new Test006();
        test06.main(args);
    }
}

 class Test006{
    public  void main(String[] args){
        final int PI;
        double a = 6;
        double b = 7.7;
        int c = 8;
        int e = c;
        c = c + 1;
        int d = c + e;
        System.out.println(d);
    }
}